3621 has 8 divisors (see below), whose sum is σ = 5184. Its totient is φ = 2240.

The previous prime is 3617. The next prime is 3623. The reversal of 3621 is 1263.

3621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3621 - 2² = 3617 is a prime.

It is a super-2 number, since 2×3621² = 26223282, which contains 22 as substring.

It is a Curzon number.

3621 is a lucky number.

It is a plaindrome in base 14 and base 15.

It is a junction number, because it is equal to n+sod(n) for n = 3597 and 3606.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 3621.

It is not an unprimeable number, because it can be changed into a prime (3623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16 + ... + 86.

It is an arithmetic number, because the mean of its divisors is an integer number (648).

It is an amenable number.

3621 is a deficient number, since it is larger than the sum of its proper divisors (1563).

3621 is a wasteful number, since it uses less digits than its factorization.

3621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91.

The product of its digits is 36, while the sum is 12.

The square root of 3621 is about 60.1747455333. The cubic root of 3621 is about 15.3559318111.

Adding to 3621 its reverse (1263), we get a palindrome (4884).

It can be divided in two parts, 362 and 1, that added together give a palindrome (363).

The spelling of 3621 in words is "three thousand, six hundred twenty-one".